Khavkin Iu.A., Morozova M.A., Kristallinskaia N.S. (1963) Purification of diphtheria toxin by the gel filtration method. Voprosy Meditsinskoi Khimii, 9(5), 526-529.

Khavkin Iu.A. et al. Purification of diphtheria toxin by the gel filtration method // Voprosy Meditsinskoi Khimii. - 1963. - V. 9. -N 5. - P. 526-529.

Khavkin Iu.A. et al., "Purification of diphtheria toxin by the gel filtration method." Voprosy Meditsinskoi Khimii 9.5 (1963): 526-529.

Khavkin, Iu. A., Morozova, M. A., Kristallinskaia, N. S. (1963). Purification of diphtheria toxin by the gel filtration method. Voprosy Meditsinskoi Khimii, 9(5), 526-529.